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Powered by COVER STORY Sika ViscoCrete Technology case study ® ® Bangalore Metro rail Project Construction of Metro rail viaduct for total 33 km including underground section – divided as different reaches spread in four directions of city with an intersection Te viaduct structure is supported with pier 12.5mm: 470.58Kg project. Based on a new polymer introduced according to the required strength with pile R. Sand: 698.82 Kg by Sika AG during 2010, this product foundation. Water: 164.02 Kg matches the requirement of precast concrete Compressive strength required are: Pile Sika ViscoCrete 10 Top BM: 2.025 Kg in hot weather condition 35MPa, Pier 60MPa, Segments 50MPa. W/C ratio: 0.32 Concrete requirement for precast Slump retention: 120 cm for 3 hours Prime Test Data Segments: Sika viscocrete 10 Top BM, the indigenously Working at M50, M60 - C 50 MPa, developed super plasticiser for this project Workability: 120mm/120 minutes at 0.5 - High early strength (20 Mpa/24 hrs) has water reduction of around 28 per cent, per cent BWOC Mix design: high slump life, and great early strength Air content: < 1.5% Sika India Pvt. Ltd. development. Tis product is being used Final setting: 12 hrs OPC: 460 Kg primarily for precast segments and Piers 1D CS: 20-25 MPA 20mm: 707.58 Kg by the various contractors working in these 28 Day CS: 65-75 MPA Underground Rail Tunnel Delhi Metro rail Project • Te tunnel length was of 8 KM, a • Target Set Time 30 Min. part of Delhi Metro Project, under • Target Strength 1Hr. -0.05 MPa package BC-16. • Target Strength 24Hr. -0.4 MPa • Te construction period was 24 months and the over all cost of the Precast Mix (M50) construction was $175 Million • Cement 394 KG • 4 TBM`s were being used for Tunnel • Micro Silica 0.5 KG boring. • Fly Ash 70 KG • Tere are 4 Metro Stations. • CA 20mm 682 KG • Concrete Quantity was 0,175 Million • CA 10mm 455 KG Cubic meter. • Sand 680 KG • Sika had supplied around 60 per • Water 144 KG cent of Chemicals & waterproofng • Viscocrete 20HE 1.5 KG systems. • Products mainly used, - Sikament Technical Data 170 UV, Viscocrete 20HE, Sigunit • Workability 25mm (Slump ) L, Plastiment VZ, Sikaplan WP • Strength 12hr. 16 MPA 20HL,Sikarep microcrete-4. • Steam Cured 8 Hr. 17 MPA • Metro Station Water Proofng Backfll Grout Mix • Material Quantity • Cement 240 KG • Total Area for Waterproofng – • Bentonite 35 KG 90000 Sq M • Water 828 KG • Fully Automatic Leister M/C used • Stabilizer 2 Liter for membrane welding. • (Plastiment VZ) • Geotextile (Sarnafelt 300) -90000 • Accelerator 80 Liter Sqm. Used as a cushion to Membrane. • (Sigunit L) • Other Items used Termination • Technical Data bars, U-bar, Roundels, Sarnacol 808 • Target Gel Time 8-15 sec. (Adhesive) u aPrIL 2017 |construction opportunities 67